diff --git a/tox.ini b/tox.ini
index eca8603..ca6fe32 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,4 +47,4 @@ deps =
 commands =
     zope-testrunner --test-path={toxinidir} -s plone.app.textfield
 extras =
-    test
+    tests